Improvement in stave-jointers



am site JOHN SHERMAN AND WILLIAM MARRIOTT, or CLEVELAND, onIo.

Letters Patent No. 113,214, dated March 28, 1871.

IMPROVEMENT IN .STAVE-JOINTERSA.

The Schedule ref-erred to irl-these Letters Patent and making part of the same.

We, J onN SHERMAN and WILLIAM MARRIOTT, of Cleveland, in the county of Cuyahoga and State of Ohio, haveinvented certain Improvements in Cylinders for Stava-Jointers, of which the following is Va specification. I

The cylinders of staveioiuters have been heretofore made with slots, at one side of o which the cutters were attached. InA operation the shavings' passing through the s'lots accumulate in .the cylinder to such an extent as to seriously clogthe same; Some cylinn ders, however, instead of being slotted, are simply grooved. `In such cases the cutters have always been attached at the rear side of the groove, so as to pro-v ject slightly overl the same, and having the entire discharge in front of the cutters.'

We have found that on thisaccount these machines are defective, the discharge not being readily effected, but filling the groove immediately in front of the cntting-edge, and thus preventing satisfactory operation. o Our object has been to avoid this difculty, and to this end--A Our invention consists in the attachment of the knives across the grooves or depressions, as hereinaff ter shown and described'7 whereby a discharge opening Yfrom the depression -at the rear of the knife is produced of snicient capacity to prevent clogging.

VIn the drawing- Figure 1 is a side view of a cylinder.V

Figure 2 is a cross-section, showing our mode of construction.`

A represents a cylinder, mounted on a shaft, B, the surface of the cylinder being curved from end to endV to conform tothelvcurve of a stave.; the cylinder having heads or spokes in each end, thus secured to the shaft, makes it mjnch stronger and steady.

In the sides of' the cylinder we make grooves or cavities C C. v 1

We do not make openings through the cylinder, but make depressions'in the casting, as seen at c, iig. 2, by which means we also retain the full strength of the` cylinder, and the shavings are .not admitted to the interior of' the cylinder.

vThe grooves C C are made diagonally in the surface of the cylinder from the centertoward the ends, and over them are secured the knives el d, lengthwise and near the-front side of the grooves, the knives cutting the stave in manner like the common plane, the shavings being discharged ont of the groove at the rear side of the knife and toward the ends of the cylinder, thus completely freeing the knives and cylinder from the shavings.

ln the jointers where the cylinders are cut through and the shavings pass into the interior, they become soon lled with shavings and the knives become clogged, because the centrifugal force being so great the shavings are held within the cylinders; and in order to free them the machine has to be stopped and the shavfied.

' JOHN SHERMAN. Witnesses: f WM. MARRIOTT.

E. D. STARK,

S. F. ADAMS. 4 

